<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>并集选择器</title>
    <style>
        span,
        p,
        div ul li {
            color: red;
        }
    </style>


</head>

<body>
    <span>你好</span>
    <p>你好</p>
    <div>
        <ul>
            <li>你好</li>
        </ul>

    </div>
</body>

</html>